Lincoln 5818 Lincoln Industrial 5818 18 In. Extension for Manual or Air-Operated Grease Guns and Air-Operated Control Valves, 3/16 In. Hose ID

4,500 PSI Maximum Lube Pressure. Thread size - 1/8 In. NPT (m). Strategically placed coil spring provides nonslip, push-pull grip and prevents accidental kinking which could cause hose ruptures. 3/16 In. ID.